2.20.3, 2.22.1, and 2.23.3 Security Advisory

Friday, Feb 2nd, 2007

Bugzilla is a Web-based bug-tracking system used by a large number of
software projects. The following security issue has been discovered
in Bugzilla:

* A possible cross-site scripting (XSS) vulnerability in Atom feeds
produced by Bugzilla.

* Web server settings given by Bugzilla which provide security settings
to protect data files from access via the web are overridden by the
mod_perl startup script when running under mod_perl (development
snapshot only).

All affected installations are encouraged to upgrade as soon as

Vulnerability Details

Class:       Cross-Site Scripting
Versions:    2.20.1 and above

Description: Bugzilla does not properly escape some fields in generated
Atom feeds, which leads to the potential for cross-site
scripting in feed readers that support javascript and
properly implement the Atom feed specification.

Class:       Database password disclosure
Versions:    2.23.3 only

Description: Bugzilla development snapshot version 2.23.3 introduced
the ability to run Bugzilla under mod_perl on Apache.
The mod_perl initialization script included with Bugzilla
defines a new  block in the Apache configuration
for the directory containing Bugzilla. This block fails to
include permission for .htaccess files to override file
access permissions.  The .htaccess file shipped with
Bugzilla prohibits access by web browsers to read the
localconfig file, which contains the username and password
for connecting to the database server.
If you are not running Bugzilla under mod_perl, then this
does not affect you.

Vulnerability Solutions

The fix for this issue is included in the 
releases. Upgrading to a release with the relevant fix will
protect your installation from possible exploits of this issue.

If you are unable to upgrade but would like to patch just the security
vulnerability, there are patches available for the issue at the
"References" URL.

Full release downloads, patches to upgrade Bugzilla from previous
versions, and git upgrade instructions are available at:



The Bugzilla team wish to thank the following people for their
assistance in locating, advising us of, and assisting us to fix this

Issue 1 Reporter: Frédéric Buclin
Issue 1 Fixed by: Frédéric Buclin, Max Kanat-Alexander, Dave Miller

Issue 2 Reporter: Dave Miller
Issue 2 Fixed by: Dave Miller, Olav Vitters, Frédéric Buclin, Max Kanat-Alexander

General information about the Bugzilla bug-tracking system can be found


Comments and follow-ups can be directed to the mozilla.support.bugzilla
newsgroup or the support-bugzilla mailing list.
https://www.bugzilla.org/support/ has directions for accessing these